ASoC: mt8173-rt5650: Drop unused includes

ASoC: mt8173-rt5650: Drop unused includes

This driver includes the legacy GPIO header <linux/gpio.h> and
<linux/of_gpio.h> but does not use any symbols from either of
them so drop the includes.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20231006-descriptors-asoc-mediatek-v1-6-07fe79f337f5@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>